'The Lawyer and the Cow', number 5318 in the Roud Folk Song Index. The only example listed at present was recorded by Nick and Mally Dow from Beth Bond of Blackpool on 16 February 1985. It was issued in the later '80s on Old House Music OHC 105, Fleetwood Mashers: Songs and speech from the Lancashire Fylde Coast.

The lyric posting you mention was at  Songs About Lawyers or the Law: THE LAWSUIT

There is another thread, though, which you may find more enlightening, as it refers to a cd recording of the song made by Beth's son John:

The Lawyer - 2 Farmers - 1 Cow HELP

As like as not it was one or other of those two recordings that you heard.